BINGPET Blue White Striped Fashion Cute Dog Sweater For Winter M The material is acrylic ,well made,soft and warm.It's a nice weight and not at all scratchy.Hold up well for a long time. Size:Back length 11.8 inches.Chest girth 14.1.Neck girth 11.Measure your dog from the base of the neck to the base of the tail for back length.If your dog has chubby legs, order up.If you are between sizes, order up.then the dog can still grow a little and wear it with ease. As a sweater,so much easier to get on and off compared to a stiff and bulky coat. Your puppy would love it and willing to wear it on and off this winter even sleeps in it on cold nights, even won't willing to go outside without it. Very cute sweater in classic stripe pattern.Can't wait for your dog to wear its own sweater to all the upcoming festival!